Electronics Calculators
Ohm's Law, voltage drop, resistor, and electrical calculation tools
Electronics Calculators
Professional electrical and electronics calculators for engineers, technicians, and hobbyists. Calculate voltage, current, resistance, power, and component values with precision.
Calculate voltage, current, resistance, and power using Ohm's Law (V=IR, P=VI)
How to use: Apply Ohm's Law to calculate electrical circuit values. Select what to Calculate For (Voltage, Current, Resistance, or Power). Enter any two known values - the calculator determines the rest. Formulas: V = I × R (voltage = current × resistance), P = V × I (power = voltage × current). Example: 12V source with 6Ω resistor yields 2A current and 24W power. Common applications: LED circuits (calculate current-limiting resistor), power supply design (determine voltage/current), circuit troubleshooting (verify expected values). Household voltage: US 120V, Europe 230V. USB power: 5V. Car battery: 12V. Essential for electronics design, repair, and education.
Complete Electronics Calculator Suite
Professional-grade electrical and electronics calculators for engineers, technicians, students, and hobbyists. Calculate electrical parameters with precision using industry-standard formulas and methods.
Basic Electrical Laws
- • Ohm's Law calculator (V=IR)
- • Power calculations (P=VI, P=V²/R)
- • Current, voltage, resistance solving
- • Electrical parameter conversions
- • Circuit analysis tools
Voltage & Current
- • Voltage drop calculations
- • Wire gauge recommendations
- • Current capacity analysis
- • Power loss calculations
- • Circuit efficiency analysis
Component Calculations
- • Resistor color code decoder
- • Series/parallel combinations
- • LED current limiting resistors
- • Capacitor value calculations
- • Component tolerance analysis
Circuit Design
- • Wire sizing for applications
- • Voltage drop optimization
- • Power distribution planning
- • Safety factor calculations
- • Load analysis tools
LED & Lighting
- • LED resistor calculations
- • Forward voltage analysis
- • Current limiting design
- • Series vs parallel configuration
- • Power consumption optimization
Professional Tools
- • Engineering-grade precision
- • Industry standard formulas
- • Code compliance checking
- • Safety recommendations
- • Technical documentation